disable multi device link and show warnings placeholder

_locales/en/messages.json

@@ -1318,6 +1318,18 @@
     "message": "Typing Indicators",
     "description": "Title of the typing indicators setting"
   },
+  "multiDeviceDisabledTemporary": {
+    "message": "<FIXME placeholder>",
+    "description": "Description of why multi device is disabled"
+  },
+  "multiDeviceDisabledTemporaryToastMessage": {
+    "message": "<FIXME placeholder>",
+    "description": "Description of why multi device is disabled on a toast on app start"
+  },
+  "multiDeviceDisabledTemporaryToastDescription": {
+    "message": "<FIXME placeholder> ",
+    "description": "Description of why multi device is disabled on a toast on app start"
+  },
   "messageTTL": {
     "message": "Message TTL",
     "description": "Title of the Message TTL setting"

ts/components/session/ActionsPanel.tsx

@@ -56,6 +56,19 @@ export class ActionsPanel extends React.Component<Props, State> {
           },
           'refreshAvatarCallback'
         );
+        setTimeout(
+          () =>
+            window.pushToast({
+              title: window.i18n('multiDeviceDisabledTemporaryToastMessage'),
+              description: window.i18n(
+                'multiDeviceDisabledTemporaryToastMessage'
+              ),
+              type: 'warning',
+              id: 'multiDeviceDisabledTemporaryToastMessage',
+              shouldFade: false,
+            }),
+          4000
+        );
       }
     );
   }

ts/components/session/RegistrationTabs.tsx

@@ -558,7 +558,8 @@ export class RegistrationTabs extends React.Component<{}, State> {
             SessionButtonColor.Green
           )}
           <h4>{or}</h4>
-          {this.renderLinkDeviceToExistingAccountButton()}
+          {/* FIXME enable back to allow linking of device
+              this.renderLinkDeviceToExistingAccountButton() */}
         </div>
       );
     }
@@ -584,7 +585,8 @@ export class RegistrationTabs extends React.Component<{}, State> {
       <div>
         {this.renderContinueYourSessionButton()}
         <h4>{or}</h4>
-        {this.renderLinkDeviceToExistingAccountButton()}
+        {/* FIXME enable back to allow linking of device
+            this.renderLinkDeviceToExistingAccountButton()*/}
       </div>
     );
   }

ts/components/session/settings/SessionSettings.tsx

@@ -644,7 +644,7 @@ export class SettingsView extends React.Component<SettingsViewProps, State> {
           id: 'no-linked-device',
           title: noPairedDeviceText,
           type: undefined,
-          description: '',
+          description: window.i18n('multiDeviceDisabledTemporary'),
           category: SessionSettingCategory.Devices,
           content: {},
           comparisonValue: undefined,

ts/components/session/settings/SessionSettingsHeader.tsx

@@ -74,9 +74,12 @@ export class SettingsHeader extends React.Component<Props, any> {
         ? `${categoryTitlePrefix.slice(0, -1)} Settings`
         : `${categoryTitlePrefix} Settings`;
     const showSearch = false;
-    const showAddDevice =
+    const showAddDevice = false;
+    /* FIXME enable back to allow linking of device
+      const showAddDevice =
       category === SessionSettingCategory.Devices &&
       this.props.showLinkDeviceButton;
+      */
 
     return (
       <div className="session-settings-header">